THere is no limit. You can take it as long as you like, and as long as no new health concerns crop up that might make it a bad choice.
The only way you can delay menstruation is by taking birth control pills.
In theory, anytime after menstruation has begun.
It should be the same amount of time as when NOT on birth control.
Nothing. You are just not guaranteed to not be pregnant when you start taking them. It's always best to follow the directions on these things...
If he is taking female birth control pills forget him. They contain hormones and he is not taking them for birth control.
Birth control inhibits fertilization, not menstruation. Menstrual cycle will still continue.
There is no "follicular phase of menstruation" when you're on hormonal birth control.
Hormonal birth control suppresses the menstrual cycles to stop ovulation, thus it will take time for your body to ovulate once you stop taking the birth control. You may get a withdrawal bleed three days after you stop taking a hormonal birth control pill, this is bleeding that mimics menstruation while on the combination pill, caused by the drop in synthetic hormones when you stop taking the active pills.
The withdrawal bleeding is not regular menstruation. Birth control changes the hormones in your body and suppresses ovulation, therefore there's no egg that was released to cause menstruation. That's why birth control prevents pregnancy.
Nothing, Taking birth control is her choice
Birth control pills help . Otherwise there isn't much to do.
It is possible to "skip" menstruation by not taking the placebo birth control pills and instead starting a new pack.